/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

// Keep in (case-insensitive) order:

#include "gfxMatrix.h"

#include "mozilla/dom/SVGAElement.h"

#include "mozilla/dom/MutationEventBinding.h"

#include "nsAutoPtr.h"

#include "nsSVGContainerFrame.h"

#include "nsSVGIntegrationUtils.h"

#include "nsSVGUtils.h"

#include "SVGLengthList.h"

using namespace mozilla;

class nsSVGAFrame final : public nsSVGDisplayContainerFrame

{

  friend nsIFrame*

  NS_NewSVGAFrame(nsIPresShell* aPresShell, ComputedStyle* aStyle);

protected:

  explicit nsSVGAFrame(ComputedStyle* aStyle)

    : nsSVGDisplayContainerFrame(aStyle, kClassID)

  {}

public:

  NS_DECL_FRAMEARENA_HELPERS(nsSVGAFrame)

#ifdef DEBUG

  virtual void Init(nsIContent*       aContent,

                    nsContainerFrame* aParent,

                    nsIFrame*         aPrevInFlow) override;

#endif

  // nsIFrame:

  virtual nsresult  AttributeChanged(int32_t         aNameSpaceID,

                                     nsAtom*        aAttribute,

                                     int32_t         aModType) override;

#ifdef DEBUG_FRAME_DUMP

  virtual nsresult GetFrameName(nsAString& aResult) const override

  {

    return MakeFrameName(NS_LITERAL_STRING("SVGA"), aResult);

  }

#endif

};

//----------------------------------------------------------------------

// Implementation

nsIFrame*

NS_NewSVGAFrame(nsIPresShell* aPresShell, ComputedStyle* aStyle)

{

  return new (aPresShell) nsSVGAFrame(aStyle);

}

NS_IMPL_FRAMEARENA_HELPERS(nsSVGAFrame)

//----------------------------------------------------------------------

// nsIFrame methods

#ifdef DEBUG

void

nsSVGAFrame::Init(nsIContent*       aContent,

                  nsContainerFrame* aParent,

                  nsIFrame*         aPrevInFlow)

{

  NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::a),

               "Trying to construct an SVGAFrame for a "

               "content element that doesn't support the right interfaces");

  nsSVGDisplayContainerFrame::Init(aContent, aParent, aPrevInFlow);

}

#endif /* DEBUG */

nsresult

nsSVGAFrame::AttributeChanged(int32_t         aNameSpaceID,

                              nsAtom*        aAttribute,

                              int32_t         aModType)

{

  if (aNameSpaceID == kNameSpaceID_None &&

      aAttribute == nsGkAtoms::transform) {

    // We don't invalidate for transform changes (the layers code does that).

    // Also note that SVGTransformableElement::GetAttributeChangeHint will

    // return nsChangeHint_UpdateOverflow for "transform" attribute changes

    // and cause DoApplyRenderingChangeToTree to make the SchedulePaint call.

    NotifySVGChanged(TRANSFORM_CHANGED);

  }

  // Currently our SMIL implementation does not modify the DOM attributes. Once

  // we implement the SVG 2 SMIL behaviour this can be removed

  // SVGAElement::SetAttr/UnsetAttr's ResetLinkState() call will be sufficient.

  if (aModType == dom::MutationEvent_Binding::SMIL &&

      aAttribute == nsGkAtoms::href &&

      (aNameSpaceID == kNameSpaceID_None ||

       aNameSpaceID == kNameSpaceID_XLink)) {

    dom::SVGAElement* content = static_cast<dom::SVGAElement*>(GetContent());

    // SMIL may change whether an <a> element is a link, in which case we will

    // need to update the link state.

    content->ResetLinkState(true, content->ElementHasHref());

  }

 return NS_OK;

}